Title:
【発明の名称】GPS地上ハイブリッド位置決定システム方程式に対する代数的解を決定する方法および装置
Document Type and Number:
Japanese Patent JP2003518632
Kind Code:
A
Abstract:
A method and apparatus for use in a hybrid position location system. The method and apparatus combines measurements from Global Positioning System (GPS) and terrestrial transceiver stations to compute the location of a device. An algebraic solution to hybrid position location system equations is output from the method and apparatus. The method and apparatus determines the position of a device using a non-iterative method, as against the use of a conventional iterative least mean square method. The method of the present invention can be used to solve the location system equations in scenarios where a non-iterative solution is desirable. In certain scenarios, the location system equations may have two possible solutions. An iterative method would converge on one of the solutions, without any indication of the existence of the other ambiguous solution. Moreover, the iterative method may converge on the incorrect of the two ambiguous solutions. Use of the presently disclosed method and apparatus yields both the ambiguous solutions. The disclosed method may be followed up with iterative methods, using the solutions from the algebraic method as initial estimates of the device location for the iterative method. A different process can then select the correct solution. Thus, the algebraic method can be used to detect the existence of ambiguous solutions, and to find both solutions.
Inventors:
Fernandez-Covaton, Ivan Jay
Bayanos, Archinus Hector
Agache, Paragu A
Soliman, Samir S
Bayanos, Archinus Hector
Agache, Paragu A
Soliman, Samir S
Application Number:
JP2001549101A
Publication Date:
June 10, 2003
Filing Date:
December 07, 2000
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
G01S19/12; G01S19/03; G01S19/11; H04W60/00; H04W64/00; (IPC1-7): G01S5/02; G01S5/14; H04Q7/34
Domestic Patent References:
| JPH08184451A | 1996-07-16 | |||
| JPS62284277A | 1987-12-10 | |||
| JPH0455784A | 1992-02-24 | |||
| JPS61137009A | 1986-06-24 |
Foreign References:
| WO1999054752A1 | 1999-10-28 | |||
| WO1999047943A1 | 1999-09-23 | |||
| US5914686A | 1999-06-22 |
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)